I haven't seen anything from MP3 yet (in terms of a playable demo) but I have played bioshock. It is amazing. MP3 is going to have to bring some serious heat to even match the game's overall appeal. The game, from playing the demo, has it all -- graphics, sound, atmosphere, art direction, innovation in gameplay, on and on.... I'm a single player fiend so the lack of multiplayer means zero to.
That said, I'm hoping MP3 dispenses with the wandering around puzzle nature of the game and brings a fresh approach to the series that is much more linear and FPS oriented and shows 3rd parties how good a FPS can be on the Wii.
I hate trolls.
Systems I currently own: 360, PS3, Wii, DS Lite (2)
Systems I've owned: PS2, PS1, Dreamcast, Saturn, 3DO, Genesis, Gamecube, N64, SNES, NES, GBA, GB, C64, Amiga, Atari 2600 and 5200, Sega Game Gear, Vectrex, Intellivision, Pong. Yes, Pong.